Without the protection of the shell, sunflower hearts and chips quickly spoil, and can harbor dangerous bacteria, so it’s important to offer no more than can be eaten in a day or two. Many birds love this, as of course do squirrels, and it’s expensive. People living in apartments or who have trouble raking up seed shells under their feeders often offer shelled sunflower. So if you’re inundated with species you’d rather not subsidize at your black oil sunflower, before you do anything else, try switching to striped sunflower. Striped sunflower seeds have a thicker shell, much harder for House Sparrows and blackbirds to crack open. The black oil seeds (“oilers”) have very thin shells, easy for virtually all seed-eating birds to crack open, and the kernels within have a high fat content, extremely valuable for most winter birds. There are two kinds of sunflower-black oil and striped. ![]() ![]() Golden millet, red millet, flax, and others.Here’s our quick guide to seed types, including:
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